CBSE > Class 12 > Physics | CBSE Board | Homework Help

Given {tex}^a{\mu _g} = 1.5{/tex} and {tex}^a{\mu _w} = 1.3{/tex}
As, {tex}\delta = (\mu - 1)A{/tex}
For deviation in air, {tex}\mu = \frac{{{\mu _g}}}{{{\mu _a}}} = \frac{{1.5}}{1} = 1.50{/tex}
{tex}\therefore \delta = (1.5 - 1) \times 60^\circ{/tex} = 30°
For deviation in water, {tex}\mu = \frac{{{\mu _g}}}{{{\mu _w}}} = \frac{{1.5}}{{1.3}} = 1.15{/tex}
{tex}\therefore \delta = (1.15 - 1) \times 60^\circ {/tex} = 9°
Therefore, the angle of deviation is decreased.

0Thank You

ANSWER

Deduce an expression for displacement current

Posted by Sachin Singh 2 years, 11 months ago

CBSE > Class 12 > Physics

1 answers

Ishwar Tomar 2 years, 11 months ago

Na pto

0Thank You

ANSWER

Electric flox

Posted by Diya Bhat 2 years, 11 months ago

CBSE > Class 12 > Physics

5 answers

Nidhi Rathod 2 years, 9 months ago

Numbers of Electric field lines pass through a surface is called Electric flux.

0Thank You

Akshatha E K 2 years, 11 months ago

The no. of electric field lines passing through a small planar surface

0Thank You

Mahir Bhai 2 years, 11 months ago

Electric flux = BA CosQ

3Thank You

Sachin Singh 2 years, 11 months ago

The no. Of magnetic field lines passing through unit area

2Thank You

Sonu Kaswan 2 years, 11 months ago

0Thank You

ANSWER

Find value of sin theta . Sin2 theta. Sin3 theta for theta=30°

Posted by Mohammad Saad 2 years, 11 months ago

CBSE > Class 12 > Physics

1 answers

Sachin Singh 2 years, 11 months ago

Underroot three by four

0Thank You

ANSWER

Explain galvanometer

Posted by Neha Thakran 2 years, 11 months ago

CBSE > Class 12 > Physics

1 answers

Kaif Khan 2 years, 11 months ago

It is a device used to detect current in a circuit

1Thank You

ANSWER

If the refractive index of alcohol (OH) 6/5 and refractive of glass is 3/2 then find the refractive index of glass w. R. T alcohol

Posted by Anshu Raj 2 years, 11 months ago

CBSE > Class 12 > Physics

3 answers

Adarsh Soni 2 years, 11 months ago

1Thank You

Pendyala Sainath 2 years, 11 months ago

5/4

0Thank You

Anjan Karthi 2 years, 11 months ago

n (OH) = 6/5. n (glass) = 3/2. Therefore, n (glass wrt OH) = n (glass) / n (OH) = 3 × 5 / 6 × 2 = 15 / 12 = 5/4.//

1Thank You

ANSWER

an insulated conical shaped metallic conductor is charged positively. The surface charge density will be uniform throughout maximum at apex minimum at apex maximum at bass

Posted by Pragyan Borah 2 years, 11 months ago

CBSE > Class 12 > Physics

1 answers

Anjan Karthi 2 years, 11 months ago

Surface charge density σ = Q/A Or σ is inversely proportional to A. Therefore, apex with minimum area, will have maximum surface charge density.

0Thank You

ANSWER

Electric field intensity due to point charge

Posted by Navneet Kaur 2 years, 11 months ago

CBSE > Class 12 > Physics

4 answers

Jitendr Kushwaha 2 years, 11 months ago

Last a charge q placed at point o there is a point p at a distance r from o at which the electric field intensity is required for this we place q° at point p E=ka/r2 It is a scalar quantity

0Thank You

Deeksha Chaturvedi 2 years, 11 months ago

F/q

0Thank You

Anjan Karthi 2 years, 11 months ago

Electric field E = Q/4πε°R^2.

0Thank You

Tanuj Vishwakarma 2 years, 11 months ago

U0/4π idlsin@/r2

0Thank You

ANSWER

State Lenz law and one example

Posted by Keshar Pundir 2 years, 11 months ago

CBSE > Class 12 > Physics

1 answers

Anjan Karthi 2 years, 11 months ago

The Lenz' law of electromagnetic induction, which gives the direction of induced EMF with change in magnetic flux, states that EMF is always induced in a direction opposite to the change in flux, ie ε = dΦ/dt.

2Thank You

ANSWER

Find the rate of electrons passing through a wire carries current of 3.2 A

Posted by Himani Joshi 2 years, 11 months ago

CBSE > Class 12 > Physics

1 answers

Amit Kora 2 years, 11 months ago

Ans

1Thank You

ANSWER

Prove that no translation force x on the dipole

Posted by Lokesh Gurjar 2 years, 9 months ago

CBSE > Class 12 > Physics

1 answers

Preeti Dabral 2 years, 9 months ago

Since the electric dipole is held in a uniform electric field no net force is acting on the dipole. Force due to $-q$ is $-q E$ and force due to $+q$ is $q E$. Hence the no net force is acting on it and the translational forces is 0 .

0Thank You

ANSWER

Why Iav is equal to 0

Posted by Jannat Bano 2 years, 11 months ago

CBSE > Class 12 > Physics

1 answers

Anuj Kumar 2 years, 11 months ago

<font face ="Times New Roman">Incomplete question

0Thank You

ANSWER

A small candle 2.5cm in size is placed at 27cm in front of a concave mirror of radius of curvature 36cm. At what distance from the mirror should a screen be placed in order to obtain a sharp image? Describe the nature and size of the image. If the candle is moved closer to the mirror, how would the screen have to be moved ?

Posted by Sowmya V 2 years, 11 months ago

CBSE > Class 12 > Physics

2 answers

Anjan Karthi 2 years, 11 months ago

m = h'/h = v/u = 54/-27 = -2. Therefore, h' = -2 × 2.5 = -5 cm. Thus, the image is real, inverted and magnified. If u is reduced, when v should be increased.

0Thank You

Anjan Karthi 2 years, 11 months ago

h = 2.5 cm, u = -27 cm, f = R/2 = -36/2 = -18 cm. Therefore, 1/f = 1/v + 1/u. 1/v = 1/f - 1/u. v = fu/f-u = 18 × 27/-18-(-27) = 18×27/9 = 54 cm.

0Thank You

ANSWER

Advantages of reflecting telescope over a refracting telescope

Posted by Rosé - 2 years, 9 months ago

CBSE > Class 12 > Physics

1 answers

Preeti Dabral 2 years, 9 months ago

Reflecting telescopes have many advantages over refracting telescopes. Mirrors don't cause chromatic aberration and they are easier and cheaper to build large. They are also easier to mount because the back of the mirror can be used to attach to the mount. Reflecting telescopes have a few disadvantages as well.

0Thank You

ANSWER

What is the pahse difference between voltage and current in series L-C-R circuit

Posted by Tanvi Singh 2 years, 9 months ago

CBSE > Class 12 > Physics

1 answers

Preeti Dabral 2 years, 9 months ago

The voltage across the capacitor lags the current in the circuit by 900. Hence, the phase difference between the voltage across the capacitor and the current in the circuit is 900.

0Thank You

ANSWER

Define 1 columb

Posted by Rohit Sgarma 2 years, 11 months ago

CBSE > Class 12 > Physics

1 answers

Maheen Khan 2 years, 11 months ago

Charge on a body is said to be 1 coulomb if two charges experiences a force of repulsion or attraction of 9×10⁹ N, when they are seperated by a distance of 1m.

1Thank You

ANSWER

Gold Number ? 👀

Posted by ❤️Ritesh Gupta? 2 years, 11 months ago

CBSE > Class 12 > Physics

2 answers

Anuj Kumar 2 years, 11 months ago

<font face ="Times New Roman">They are not there

0Thank You

❤️Ritesh Gupta? 2 years, 11 months ago

Royal, PK.... insta I'd - riteshgupta16_

3Thank You

ANSWER

Is charging and discharging of capacitor is in syllabus or not???2022 23

Posted by Saloni Mehra 2 years, 11 months ago

CBSE > Class 12 > Physics

2 answers

Akshatha E K 2 years, 11 months ago

It is there

0Thank You

Sejal Sharma 2 years, 11 months ago

I don't think so

0Thank You

ANSWER

Two identical circular loops P and Q each of radius r and carrying equal currents are kept in the parallel planes having common axis passing through O. The direction of current in P is clockwise and in Q is anticlockwise as seen from O which is equidistant from the loops P and Q. Find the magnitude of the net magnetic field at O.

Posted by Shreya Malviya 2 years, 11 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

Differentiate between biot savarts law and coulombs law

Posted by Arpita Sao 2 years, 11 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

What is this band theory in semiconductor

Posted by Sachin Kumar Kumar 2 years, 11 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

What is physics ? What is the use of physics

Posted by Md Rehman 3 years ago

CBSE > Class 12 > Physics

1 answers

Khushbu Garg 3 years ago

Physics is the branch of science that deals with the structure of matter and how the fundamental constituents of the universe interact.

We use physics in our everyday life activities such as walking, playing, watching, listening, cutting, cooking, and opening and closing things.

5Thank You

ANSWER

जैक्स एक्ससीकिसीएचसी बी fulबी

Posted by Arpit Yadav 3 years ago

CBSE > Class 12 > Physics

0 answers

ANSWER

What are intrinsic semiconductors

Posted by Simmu Sharif 2 years, 9 months ago

CBSE > Class 12 > Physics

1 answers

Preeti Dabral 2 years, 9 months ago

An intrinsic semiconductor, also called an undoped semiconductor or i-type semiconductor, is a pure semiconductor without any significant dopant species present. The number of charge carriers is therefore determined by the properties of the material itself instead of the amount of impurities.

0Thank You

ANSWER

A particle having a charge +5 UC is initially AG rest at the point x is equal to 30 cm on the x-axis the particle be used to move due to the presence of a charge q that is kept fixed at the origin find the kinetic energy of the particle act the instant it has more 15 CM from its initial position if you is equal to + 5 UC 15 using

Posted by Dipendu Gope 3 years ago

CBSE > Class 12 > Physics